Portland city planners are beginning discussions about creating two historic districts on Munjoy Hill as part of a strategy to address concerns over the rapid pace of development that’s leading to large boxy condominiums replacing smaller, more traditional New England-style homes. Although there are no specific boundaries yet proposed for the two districts, maps created by city planners show the general areas under consideration. One potential district may run along the Eastern Promenade and Fore Street from Turner Street to Atlantic Street, reaching a block or two from the outside edge into the neighborhood. The other potential district could run along North Street, from Congress Street to Walnut Street. These…